Container Gardening: pine bark fines

I use a product at lowe's called soil conditioner. I thought this was
almost the same as pinebark fines which nobody here seems to have heard of.
My biggest problem is finding micronutriant powder, liquid yes, powder no.

I buy the same product and double dig it into red clay -- gorgeous soil when you're done for ANYTHING I want to plant. I transplant shrubs and trees with it. And am considering using it for winter sowing.